Recent Tutoring Session Reviews
"We worked on problems on Probability distribution functions. The problems involved some integration, and I helped the student go through the integration process step by step."
"We covered hypothesis testing primarily for the mean. We also covered the hypothesis test for a variance. We covered using test statistics, p-value, and rejection rules."
"The student has a test this Thursday on Chapters 19 and 30 - calculating confidence intervals (CI) for proportions and means. He had two review sheets from the teacher that he wanted to discuss, but first we constructed a decision tree for these types of problems for him to reference as he is studying. What I wanted to make clear is that the steps to calculating and interpreting a CI are extremely similar between proportions and means - essentially we're doing the same thing each time, the only difference is how we measure the outcome variable. Once we completed the outline, I asked the student to complete two review problems, one for proportions and one for mean, using the decision tree as a guide. He did a good job and said the outline made the problems a lot clearer to him. For one problem, we had to focus on the question of whether the sample data for a mean was skewed or contained outliers, and what was the consequence of either of these occurrences on the use of a t-critical value CI? We had to construct a frequency distribution in the student's calculator. We went back to Chapter 3, which reviewed the concepts of outlier, skewness, and granularity. The student then drew a conclusion regarding the 'robustness' of the t-critical value CI interval due to the fact that the data set provided contained an outlier AND was smaller than 30 observations. He rightly concluded that the validity of the interval is questionable. If he practices a few more problems and memorizes the formulas, he will do well on this exam."
"We went through the third statistics quiz the student had on probabilities, z-scores, using t-distributions, and calculating the margin of error. It was a little slow going with the chapter being more challenging given how the class was structured (concepts were tested that were not taught previously. However, by finishing the quiz, the student has a better grasp on how to answer questions like these and some equations to apply in certain scenarios."
"The student is preparing for her final, which covers hypothesis testing, confidence intervals, and linear regression models. We worked through several practice problems for each topic. The student is well prepared for this test."
"The student and I reviewed the homework and quiz from chapter 11. We had to go over some foundational concepts because she was having trouble understanding the basic meaning of some of the variables and numbers. I'm always so impressed by her work ethic - she is so committed to doing well!"